EP 0767929 A1 19970416 - BLOCKED LEUCO DYES FOR PHOTOTHERMOGRAPHIC ELEMENTS
Title (en)
BLOCKED LEUCO DYES FOR PHOTOTHERMOGRAPHIC ELEMENTS
Title (de)
GESCHÜTZTE LEUKOFARBSTOFFE FÜR PHOTOTHERMOGRAPHISCHE ELEMENTE
Title (fr)
COLORANTS LEUCO BLOQUES POUR ELEMENTS PHOTOTHERMOGRAPHIQUES
Publication
Application
Priority
- US 9506282 W 19950517
- US 26943894 A 19940630
Abstract (en)
[origin: US5696289A] A photothermographic element containing a support bearing at least one heat-developable, photosensitive, image-forming photothermographic emulsion layer is provided. The emulsion layer comprises: (a) a photosensitive silver halide; (b) a non-photosensitive, reducible source of silver; (c) a leuco dye reducing agent; and (d) a binder; wherein the leuco dye reducing agent comprises a blocked leuco dye compound of the general formula L-R1, which is capable of being oxidized to a colored form, wherein: (i) L is a group remaining after removal of a hydrogen from a leuco dye; and (ii) R1 is a C(O)-NH-SO2-R5 group wherein R5 is an aliphatic group or an aromatic group.
IPC 1-7
IPC 8 full level
G03C 8/40 (2006.01); C07C 311/60 (2006.01); G03C 1/498 (2006.01)
CPC (source: EP US)
C07C 311/60 (2013.01 - EP US); G03C 1/49854 (2013.01 - EP US); G03C 7/32 (2013.01 - EP US); G03C 8/4013 (2013.01 - EP US); G03C 2200/21 (2013.01 - EP US); G03C 2200/37 (2013.01 - EP US); Y10S 430/156 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
US 5696289 A 19971209; EP 0767929 A1 19970416; JP H10502460 A 19980303; US 5492805 A 19960220; WO 9600929 A1 19960111
DOCDB simple family (application)
US 55852695 A 19951116; EP 95919881 A 19950517; JP 50313796 A 19950517; US 26943894 A 19940630; US 9506282 W 19950517